Description of problem:
In libvirt we are implementing callbacks for the avc_log_callback struct. When compiling with -Werror=missing-format-attribute, we get a warning caused by the selinux/avc.h header file:

  CC     libvirt_driver_access_la-viraccessdriverselinux.lo
access/viraccessdriverselinux.c:59:5: error: initialization left-hand side might be a candidate for a format attribute [-Werror=missing-format-attribute]
access/viraccessdriverselinux.c: In function 'virAccessDriverSELinuxAVCCreateThread':
access/viraccessdriverselinux.c:247:9: error: expected expression before ')' token

This is caused by this struct definition:

struct avc_log_callback {
        /* log the printf-style format and arguments. */
        void (*func_log) (const char *fmt, ...);



Which should have an annotation like:

struct avc_log_callback {
        /* log the printf-style format and arguments. */
        void (*func_log) (const char *fmt, ...) __attribute__ ((__format__(printf, 1, 2)));


This ensures the compiler does strict argument checking


Version-Release number of selected component (if applicable):
libselinux-2.1.6-5.fc16.x86_64

Affects all Fedora releases & all RHEL